diff --git a/tools/testing/selftests/vm/pkey-powerpc.h b/tools/testing/selftests/vm/pkey-powerpc.h
index 2f7174ee90e5460062f1a5661480d09cd043ff4f..e4aa5977388b5e158e6c9e9881d557983d8ce2bb 100644
--- a/tools/testing/selftests/vm/pkey-powerpc.h
+++ b/tools/testing/selftests/vm/pkey-powerpc.h
@@ -16,13 +16,11 @@
 #define fpregs			fp_regs
 #define si_pkey_offset		0x20
 
-#ifndef PKEY_DISABLE_ACCESS
-# define PKEY_DISABLE_ACCESS	0x3  /* disable read and write */
-#endif
+#undef PKEY_DISABLE_ACCESS
+#define PKEY_DISABLE_ACCESS	0x3  /* disable read and write */
 
-#ifndef PKEY_DISABLE_WRITE
-# define PKEY_DISABLE_WRITE	0x2
-#endif
+#undef PKEY_DISABLE_WRITE
+#define PKEY_DISABLE_WRITE	0x2
 
 #define NR_PKEYS		32
 #define NR_RESERVED_PKEYS_4K	27 /* pkey-0, pkey-1, exec-only-pkey